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1.
:?
An emoticon used to denote confusion. It can also mean an unsureness of what facial expression would be appropriate in this situation.
Tommy: I know what you did last night
Bob: aaaah! what'd I do? *confusion* :? :?
by Bern Fersho February 25, 2009
 
2.
:?
hitting the pipe.
Why is that old lady driving so damn slow?
She must have been hitting :? er somethin.
by inquisitive January 13, 2009